1 import sys, traceback 2  3 traceback_template = ‘‘‘Traceback (most recent call last): 4   File "%(filename)s", line %(lineno)s, in %(name)s 5 %(type)s: %(message)s\n‘‘‘ # Skipping the "actual line" item 6  7 # Also note: we don‘t walk all the way through the frame stack in this example 8 # see hg.python.org/cpython/file/8dffb76faacc/Lib/traceback.py#l280 9 # (Imagine if the 1/0, below, were replaced by a call to test() which did 1/0.)10 11 try:12     1/013 except:14     # http://docs.python.org/2/library/sys.html#sys.exc_info15     exc_type, exc_value, exc_traceback = sys.exc_info() # most recent (if any) by default16 17     ‘‘‘18     Reason this _can_ be bad: If an (unhandled) exception happens AFTER this,19     or if we do not delete the labels on (not much) older versions of Py, the20     reference we created can linger.21 22     traceback.format_exc/print_exc do this very thing, BUT note this creates a23     temp scope within the function.24     ‘‘‘25 26     traceback_details = {27                          ‘filename‘: exc_traceback.tb_frame.f_code.co_filename,28                          ‘lineno‘  : exc_traceback.tb_lineno,29                          ‘name‘    : exc_traceback.tb_frame.f_code.co_name,30                          ‘type‘    : exc_type.__name__,31                          ‘message‘ : exc_value.message, # or see traceback._some_str()32                         }33 34     del(exc_type, exc_value, exc_traceback) # So we don‘t leave our local labels/objects dangling35     # This still isn‘t "completely safe", though!36     # "Best (recommended) practice: replace all exc_type, exc_value, exc_traceback37     # with sys.exc_info()[0], sys.exc_info()[1], sys.exc_info()[2]38 39 40     ## 修改这里就可以把traceback打到任意地方，或者存储到文件中了41     print traceback_template % traceback_details